4Euro-Mediterranean Institute of Environment and Renewable Energies, University of Valenciennes, France.

Abstracts

Climate is an essential factor in the physiological activity of plants. The radiation is predominantly involved in photosynthesis and temperature, which largely determines their growth and development. Sweating plays a fundamental role in the movement of water and minerals in plants and it also greatly depends on the temperature and humidity of the air. Greenhouses are structures that make it possible to control the climatic environment so that plants are in a Environment, the latter requires an intelligent and precise control to achieve it and ensure optimal management. The management of micro climate in greenhouses is a certain skill, especially in the sunny regions (arid and semi-arid region). However, the analysis of the response of a greenhouse as a function of the external climatic conditions then makes it possible to better understand its operation. A more precise analysis of the mechanisms governing the exchange (heat and mass) between indoor air and the environment is therefore essential for improving irrigation, ventilation and heating systems and thus Better climate control under shelter. It is even possible to optimize the systems of fertilization, and spraying, thus the agro-greenhouse system in general. This problem concerns all the more the farmers (the serrists) and the manufacturers of greenhouse together; Since these mechanisms are limiting factors which have a strong influence on production both in terms of quantity and quality, it now appears that good management of the greenhouse microclimate can both improve crop preservation and reduce Costs incurred. The micro-climate management interface of the agricultural greenhouse takes into account sunshine, temperature, humidity level, external weather conditions such as rain, wind direction and wind speed. It intervenes alone according to the needs of the plant, but modifications can nevertheless be carried out remotely by the user by the sensor means and the actuators. Current systems in agricultural greenhouses follow logical rules according to a binary system: if the temperature exceeds a predefined threshold, the automaton is triggered to refresh or reheat the ambient air. What we are trying to develop is a control law that allows to optimize the growth of plants while reducing the energy costs. The